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505213 is a prime number
BaseRepresentation
bin1111011010101111101
3221200000121
41323111331
5112131323
614454541
74202632
oct1732575
9850017
10505213
11315635
12204451
13148c57
14d2189
159ea5d
hex7b57d

505213 has 2 divisors, whose sum is σ = 505214. Its totient is φ = 505212.

The previous prime is 505201. The next prime is 505231. The reversal of 505213 is 312505.

Together with next prime (505231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 480249 + 24964 = 693^2 + 158^2 .

It is a cyclic number.

It is not a de Polignac number, because 505213 - 25 = 505181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252606 + 252607.

It is an arithmetic number, because the mean of its divisors is an integer number (252607).

2505213 is an apocalyptic number.

It is an amenable number.

505213 is a deficient number, since it is larger than the sum of its proper divisors (1).

505213 is an equidigital number, since it uses as much as digits as its factorization.

505213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150, while the sum is 16.

The square root of 505213 is about 710.7833706552. The cubic root of 505213 is about 79.6449368753.

Adding to 505213 its reverse (312505), we get a palindrome (817718).

The spelling of 505213 in words is "five hundred five thousand, two hundred thirteen".